                      :convention_id (str con_uuid)
                      :persons [(str second_person)]
                      :preferred_slot_id nil
+                     :preferred_day nil
                      :event_count 1
                      :event_type "single"}
               :status 200}

             :name "Foo"
             :persons [(str person_uuid)]
             :preferred_slot_id nil
             :event_count 1
             :event_type "single"}
            :status 200}

               :convention_id (str con_uuid)
               :persons []
               :preferred_slot_id nil
               :preferred_day nil
               :event_count 1
               :event_type "single"}
              :status 200}
